On Mon, 06 Jun 2022 22:22:18 +0200, Rasmus Villemoes wrote: > We have a board where measurements indicate that the current three > options - leaving IO_IMPEDANCE_CTRL at the (factory calibrated) reset > value or using one of the two boolean properties to set it to the > min/max value - are too coarse. > > There is no documented mapping from the 32 possible values of the > IO_IMPEDANCE_CTRL field to values in the range 35-70 ohms, and the > exact mapping is likely to vary from chip to chip. So add a DT binding > for an nvmem cell which can be populated during production with a > value suitable for each specific board. > > Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> > --- > .../devicetree/bindings/net/ti,dp83867.yaml | 18 +++++++++++++++--- > 1 file changed, 15 insertions(+), 3 deletions(-) > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
